公开(公告)号：US20090039866A1

公开(公告)日：2009-02-12

申请号：US12256289

申请日：2008-10-22

申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC分类号： G01R13/40

CPC分类号： G01R15/246

摘要： The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A second part may e.g. be analyzed by a second circular analyzer, and a third part may be analyzed by a linear analyzer. By combining the signals obtained in this way, the current induced phase delay in the returning light can be measured efficiently and accurately.

摘要翻译： 导体中的电流通过利用传感光纤中的法拉第效应来测量。 从感测光纤返回的光被分成至少两个部分，其中至少一个由第一圆形分析器分析，用于产生第一信号。 第二部分可以例如。 由第二个圆形分析仪分析，第三个部分可以用线性分析仪进行分析。 通过组合以这种方式获得的信号，可以有效和准确地测量返回光中的电流感应相位延迟。

公开(公告)号：US07046867B2

公开(公告)日：2006-05-16

申请号：US10777403

申请日：2004-02-13

申请人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

发明人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

IPC分类号： G02B6/00

CPC分类号： G01R15/247

摘要： The invention relates to a fiberoptic current or magnetic field sensor having a plurality of sensor heads, and to a corresponding measurement method. The sensor has a light source: N≧2 sensor heads; at least one phase modulation unit; a detector; a control and evaluation unit. The at least one phase modulation unit is connected to at least one of the sensor heads. Lightwaves can be differentially phase-modulated in a non-reciprocal fashion by means of the at least one phase modulation unit. Modulation amplitudes φ0,n and modulation frequencies vn are selected as a function of modulation-relevant optical path lengths ln.

摘要翻译： 本发明涉及具有多个传感器头的光纤电流或磁场传感器，以及相应的测量方法。 传感器有一个光源：N> = 2个传感头; 至少一个相位调制单元; 检测器 一个控制和评估单位。 至少一个相位调制单元连接到至少一个传感器头。 光波可以通过至少一个相位调制单元以不可逆的方式进行差分相位调制。 作为调制相关光程长度l N n N的函数，选择调制幅度Φ0，n N和调制频率v N n N。

公开(公告)号：US20050088662A1

公开(公告)日：2005-04-28

申请号：US10922944

申请日：2004-08-23

申请人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

发明人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

IPC分类号： G01R15/24 ,  G01R33/032 ,  G01B9/02

CPC分类号： G01R15/246 ,  G01R33/032

摘要： The fiber-optic sensor head (2) for a current or magnetic field sensor comprises an optical fiber which contains a magnetooptically active sensor fiber (3) and at least one polarization-maintaining supply fiber (5), which are optically connected, with the sensor fiber (3) having its fiber protective sheath removed. The sensor head (2) furthermore contains a capillary (6), in which at least the sensor fiber (3) is arranged. Furthermore, the sensor head (2) can be bent in the area of the sensor fiber (3), and a friction reducing means (7) is provided in the capillary (6), in order to reduce the friction between the sensor fiber (3) and the capillary (6). The friction reducing means (7) is advantageously an oil or a dry lubricating means (7). The capillary (6) is advantageously encased by a capillary casing (8). The sensor (2) allows very largely temperature-dependent measurements, is easy to install and allows measurements on large cross-section conductors.

摘要翻译： 用于电流或磁场传感器的光纤传感器头（2）包括光纤，该光纤包含磁光有源传感器光纤（3）和至少一个光学连接的偏振保持光纤（5） 传感器光纤（3），其光纤保护套被去除。 传感器头（2）还包含毛细管（6），其中布置有至少传感器光纤（3）。 此外，传感器头（2）可以在传感器光纤（3）的区域中弯曲，并且在毛细管（6）中设置有摩擦减小装置（7），以便减少传感器光纤（ 3）和毛细管（6）。 减摩装置（7）有利地是油或干式润滑装置（7）。 毛细管（6）有利地由毛细管壳体（8）包围。 传感器（2）允许很大程度上依赖于温度的测量，易于安装并允许在大横截面导体上进行测量。

公开(公告)号：US6140810A

公开(公告)日：2000-10-31

申请号：US165648

申请日：1998-10-02

申请人： Klaus Bohnert ,  Hubert Brandle ,  Philippe Gabus ,  Jadran Kostovic ,  Jiri Talir

发明人： Klaus Bohnert ,  Hubert Brandle ,  Philippe Gabus ,  Jadran Kostovic ,  Jiri Talir

IPC分类号： G01R15/24 ,  G01R29/12

CPC分类号： G01R15/241

摘要： The subject matter of the present invention is a fiber-optic outdoor high-voltage sensor 1. The known sensor principle is based on the fact that a piezoelectric quartz cylinder 3 wound with a glass fiber 4a effects a voltage-proportional fiber strain which is measured interferometrically. According to the invention, a 420 kV outdoor sensor 1 is created by virtue of the fact that several quartz cylinders 3 and electrically conductive spacing elements 5 are arranged in an alternating fashion one behind another and are sealed in a silicone-shielded 17 insulating tube 16 by means of polyurethane 18 or silicone 21. Dividing the high voltage between several spaced, E-field integrating sensor elements 2 permits simple field control and a very high measuring accuracy. In addition, the fiber-optic voltage sensor 1 is distinguished by a low outlay on insulation, compactness and low weight, and can easily be scaled to other voltage levels and be effectively combined with optical current sensors 38.

摘要翻译： 本发明的主题是光纤室外高压传感器1.已知的传感器原理是基于以下事实：卷绕有玻璃纤维4a的压电石英气缸3实现测量的电压 - 比例纤维应变 干涉式 根据本发明，由于几个石英气缸3和导电间隔元件5以交替的方式彼此排列并被密封在硅树脂屏蔽17绝缘管16中的事实而产生420kV室外传感器1 通过聚氨酯18或硅树脂21.在几个间隔的E场积分传感器元件2之间划分高电压允许简单的场控制和非常高的测量精度。 此外，光纤电压传感器1的特征在于绝缘性，紧凑性和重量轻的低成本，并且可以容易地缩放到其他电压电平并且与光电流传感器38有效地组合。

公开(公告)号：US07692420B2

公开(公告)日：2010-04-06

申请号：US12256289

申请日：2008-10-22

申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC分类号： G01R31/00

CPC分类号： G01R15/246

摘要： The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A second part may e.g. be analyzed by a second circular analyzer, and a third part may be analyzed by a linear analyzer. By combining the signals obtained in this way, the current induced phase delay in the returning light can be measured efficiently and accurately.

摘要翻译： 导体中的电流通过利用传感光纤中的法拉第效应来测量。 从感测光纤返回的光被分成至少两个部分，其中至少一个由第一圆形分析器分析，用于产生第一信号。 第二部分可以例如。 由第二个圆形分析仪分析，第三个部分可以用线性分析仪进行分析。 通过组合以这种方式获得的信号，可以有效和精确地测量返回光中的电流感应相位延迟。

公开(公告)号：US06630658B1

公开(公告)日：2003-10-07

申请号：US09623048

申请日：2000-11-20

申请人： Klaus Bohnert ,  Hubert Brandle

发明人： Klaus Bohnert ,  Hubert Brandle

IPC分类号： G01J104

CPC分类号： G02B6/022 ,  G01D5/35316 ,  G01D5/3538 ,  G01L11/025 ,  G02B6/02085 ,  G02B6/105

摘要： The invention relates to a frequency-coded fiber laser pressure sensor (1) which is especially suitable for measuring isotropic pressures in oil wells. The sensor principle provided for in the invention is based on the fact that in a fiber laser (2) doped with Er3+ a monomode or bimodal sensor fiber (5, 5a, 5b) is positioned whose pressure-related birefraction results in a frequency shift and beat frequencies between the orthogonal linear polarisation modes x, y or the spatial modes LP01 and LP11straight line. The beat frequencies are easily measured using a frequency counter (19). Temperature-related variations in birefraction are compensated in a differential arrangement of two sensor fiber segments (5a, 5b). Fiber-integrated Bragg gratings (4a, 4b) with low bandwidths (0.2 nm) are especially suitable as laser end reflectors. The pressure sensor (1) is characterized by a large measurement range (100 Mpa) and a high triggering capacity , (kPa), is readily multiplexed and can be housed in a very compact, light-weight and robust pressure-resistant housing (25).

摘要翻译： 本发明涉及一种频率编码的光纤激光压力传感器（1），其特别适合于测量油井中的各向同性压力。 在本发明中提供的传感器原理基于以下事实：在掺杂有Er 3+的单模或双峰传感器光纤（5,5a，5b）的光纤激光器（2）中定位其压力相关双折射结果 正交线性偏振模x，y或空间模式LP01和LP11 <直线之间的频移和拍频。 使用频率计数器（19）容易地测量拍频。 温度相关的双折射变化在两个传感器光纤段（5a，5b）的差分布置中被补偿。 具有低带宽（0.2nm）的光纤集成布拉格光栅（4a，4b）特别适用于激光端反射器。 压力传感器（1）的特征在于测量范围大（100Mpa）和高触发能力（kPa）容易复用，并且可以容纳在非常紧凑，重量轻且耐用的耐压外壳（25 ）。

公开(公告)号：US20090290165A1

公开(公告)日：2009-11-26

申请号：US12488779

申请日：2009-06-22

申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC分类号： G01B9/02 ,  C03B37/023 ,  G01N23/00

CPC分类号： G01R15/242 ,  G01R15/247

摘要： An electro-optical high-voltage sensor includes a waveguiding sensing fiber of an electro-optical material. The electrical field of the voltage to be measured is substantially parallel to the longitudinal axis of the sensing fiber. The sensing fiber carries two orthogonally polarized light waves, with the applied field affecting the birefringence between the waves. Using an electro-optical waveguiding fiber in this configuration allows the voltage between two widely spaced points to be accurately measured.

摘要翻译： 电光高压传感器包括电光材料的波导感测光纤。 要测量的电压的电场基本上平行于感测光纤的纵向轴线。 感测光纤承载两个正交偏振光波，其中施加的场影响波之间的双折射。 在这种结构中使用电光波导纤维可以精确地测量两个广泛间隔的点之间的电压。

公开(公告)号：US5136236A

公开(公告)日：1992-08-04

申请号：US584715

申请日：1990-09-19

申请人： Klaus Bohnert ,  Hubert Brandle ,  Lutz Niemeyer ,  Roland Stierlin

发明人： Klaus Bohnert ,  Hubert Brandle ,  Lutz Niemeyer ,  Roland Stierlin

IPC分类号： G01R15/24 ,  G01R19/00

CPC分类号： G01R15/24 ,  H01H33/027

摘要： In a gas-insulated switchgear having an isolated-phase bus, a current-carrying bus (2) with a given external radius R.sub.1 is arranged coaxially in a cylindrical enclosure with a given external radius R.sub.2, the voltage of the current carrying bus is measured using optical fiber voltage transducers. For this purpose, at least three identical piezoelectric sensor elements are provided. They are arranged essentially at a distance corresponding to the internal radius R.sub.2 from an axis of the current carrying bus in the enclosure at identical angular distances. The sensor elements are preferably accommodated together with an optical fiber curent transducer in a metal ring that can be inserted into the enclosure.

摘要翻译： 在具有隔离相母线的气体绝缘开关设备中，具有给定外径半径R1的载流母线（2）同轴地布置在具有给定外径半径R2的圆柱形外壳中，测量载流母线的电压 使用光纤电压传感器。 为此，提供至少三个相同的压电传感器元件。 它们以相同的角距离基本上布置在与外壳中的载流母线的轴线对应的内部半径R2的距离处。 传感器元件优选地与可插入外壳的金属环中的光纤固化传感器一起容纳在一起。

公开(公告)号：US5953121A

公开(公告)日：1999-09-14

申请号：US986191

申请日：1997-12-05

申请人： Klaus Bohnert ,  Hubert Brandle ,  Tone Schanke

发明人： Klaus Bohnert ,  Hubert Brandle ,  Tone Schanke

IPC分类号： G01R15/24 ,  G01B9/02

CPC分类号： G01R15/246

摘要： Without special measures, a fiber-optic current sensor coil (11) and fiber-optic .lambda./4 time delay elements (9, 9'), which are connected in series with the current sensor coil (11), are temperature-dependent with respect to a relative phase lag of light passing through. In order to avoid a temperature correction or temperature compensation, the current sensor coils (11) and, if appropriate, also the .lambda./4 time delay elements (9, 9') are annealed, so that virtually no mechanical stresses remain in the optical fibers. The current sensor coil (11) is preferably mounted unrestrained in a capillary (20) filled with a protective gas. The capillary (20) is embedded in a gastight fashion in a potting compound (22) made from polyurethane, and is thus also mechanically protected.

摘要翻译： 没有特殊措施，与电流传感器线圈（11）串联连接的光纤电流传感器线圈（11）和光纤λ/ 4时间延迟元件（9,9'）与温度有关 尊重光通过的相对相位滞后。 为了避免温度校正或温度补偿，电流传感器线圈（11）和（如果适用的话）λ/ 4时间延迟元件（9,9'）也被退火，使得实际上没有机械应力残留在光学 纤维。 电流传感器线圈（11）优选地安装在填充有保护气体的毛细管（20）中。 毛细管（20）以气密的方式嵌入由聚氨酯制成的灌封化合物（22）中，因此也被机械地保护。

公开(公告)号：US20070052971A1

公开(公告)日：2007-03-08

申请号：US11594170

申请日：2006-11-08

申请人： Klaus Bohnert ,  Phlippe Gabus ,  Juergen Nehring ,  Hubert Brandle

发明人： Klaus Bohnert ,  Phlippe Gabus ,  Juergen Nehring ,  Hubert Brandle

IPC分类号： G01B9/02

CPC分类号： G01R15/247 ,  G01R35/005

摘要： A fiber-optic sensor head is disclosed for an optical current or magnetic-field sensor which can have an optical fiber which includes a magnetooptically active sensor fiber which is optically connected to at least one polarization-defining element. The sensor fiber can be arranged in a magnetic field to be measured or around a conductor carrying current to be measured and can be in the form of a coil, with the coil defining a coil plane (A) with a surface normal (Ns), and with the at least one polarization-defining element having a marked axis (f). The sensor head can be flexible in the area of the sensor fiber, and an adjustment means can be provided for adjustment of a predeterminable angle β between the marked axis,(f) and the surface normal (Ns) or for adjustment of predeterminable angles β, β′ between the marked axes (f) and the surface normal (Ns).

摘要翻译： 公开了一种用于光电流或磁场传感器的光纤传感器头，其可以具有包括与至少一个偏振界定元件光学连接的磁光活性传感器光纤的光纤。 传感器光纤可以被布置在待测量的磁场中或围绕承载待测量电流的导体，并且可以是线圈的形式，线圈限定具有表面正常的线圈平面（A）（N